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From: James Kuyper <kuyper@wizard.net>
Subject: Re: STL and set_union algorithm question? (newbie to STL!)
Date: 1998/04/06
Message-ID: <35290568.2781@wizard.net>#1/1
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Approved: Fergus Henderson <fjh@cs.mu.oz.au>
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NJ Biggs wrote:
> 
> I am new to STL and am after a little help.
> 
> Can anyone please post a short example of using the set_union algorithm on
> two set<int> objects that places the result in a third set<int>.
> 
> Sort of...
> set<int> s1;
> set<int> s2;
> set<int> result;
> 
> set_union(s1.begin(), s1.end(), s2.begin(), s2.end(), result.end());
> 
> My compiler refuses to compile this due to the result.end() iterator being
> returned as a const_iterator.

set<T>::end() on a non-const set<T> object is supposed to return
set<T>::iterator, not set<T>::const_iterator. You have a defective
implementation of STL.
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